Mental Floss Presents Forbidden Knowledge: A Wickedly Smart Guide to History’s Naughtiest Bits is a trade paperback book authored by the Editors of Mental Floss. Published by HarperCollins in 2005, this 320-page book delves into various subjects related to reference, humor, and curiosities of history. With a lighthearted and entertaining tone, it explores trivia and wonders that are sure to capture readers’ attention. The book, measuring 7.6 inches in length, 8.9 inches in width, and 0.8 inches in height, offers a unique blend of information and fun for those with a love for the unusual and quirky aspects of history.